Overview
- Dense fog is expected for the Friday morning commute in the Sacramento Valley, with visibility improving by around noon and hazy sunshine to follow.
- Air quality in the San Joaquin Valley is forecast to near the unhealthy range at times, with advice for people with heart or lung conditions to limit strenuous outdoor activity and keep windows closed.
- Cleaner air is expected at higher elevations, with generally better readings in the Sacramento Valley, the Foothills, and the Sierra than in the southern San Joaquin Valley.
- Temperatures will run mild after chilly starts, with valley lows in the mid-30s and afternoon highs in the low to mid-60s, and some foothill spots near 70.
- The dry pattern persists through at least late next week, with MLK Day expected to be dry, and only a weak system possibly bringing limited mountain showers by Thursday.